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【持续更新】App Inventor 2 中文拓展一览 - App Inventor 2 中文网 - 清泛...

...写二进制数据 【数据库】LeanDB 数据库扩展 【数据库】MySQL + php后端数据库 【数据库】MongoDB + php后端数据库 AppInventor,AppInventor2,拓展0
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- App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...ce/components/storage.html#TinyWebDB 包括公众号都已经发过。mysql 通过 web api 封装中间层是没有太大难度的。还有收费第三方数据库的拓展,如 LeanDB 可以了解一下。
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常用Linux命令详解(持续更新) - 更多技术 - 清泛网 - 专注C/C++及内核技术

...profile .cshrc .ssh NRU_CMU_DISK_SIZE_NOTIFY2008 install.log .bash_logout .mysql_history.TMP .tcshrc anaconda-ks.cfg 显示每个文件详细的信息(包括文件类型、权限、大小、所属组、创建时间等)(ls -l 等同于 ll 命令) [root@KEDACOM ~]# ls -l total 64 -rw-r--...
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使用TokuMX配置Replica Set集群 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...替换了一颗真正的数据库存储引擎,我们现在可以像使用MySQL数据库一样精确的指定TokuMX最大可用内存,它也完整支持的事务处理。当然了,TokuTek引以为傲的数据压缩能力也是一点也没落下。性能详细对比请参见《TokuMX vs. MongoDB...
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How do I escape a reserved word in Oracle?

...and apparently requires the correct case—whereas, for anyone interested, MySQL defaults to using backticks (`) except when set to use double quotes for compatibility. share | improve this answer ...
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Best Practices: Salting & peppering passwords?

...e that someone with some security experience supports this method. Would a MySQL AES_ENCRYPT($passwordHash, $serverSideKey) call also be an appropriate way of implementing this? – foochow Jun 27 '13 at 19:40 ...
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9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...-j ACCEPT 类似的,对于HTTP/HTTPS(80/443)、pop3(110)、rsync(873)、MySQL(3306)等基于tcp连接的服务,也可以参照上述命令配置。 对于基于udp的dns服务,使用以下命令开启端口服务: iptables -A OUTPUT -p udp -o eth0 --dport 53 -j ACCEPT iptables -A IN...
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Difference between rake db:migrate db:reset and db:schema:load

...ord/Rakefile which has these tasks. namespace :db do task create: ["db:mysql:build", "db:postgresql:build"] task drop: ["db:mysql:drop", "db:postgresql:drop"] end This may not answer your question but could give you some insight into go ahead and look the source over especially the rake file...
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Adding a new SQL column with a default value

I am looking for the syntax to add a column to a MySQL database with a default value of 0 10 Answers ...
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Update multiple columns in SQL

... Works on MySQL. – João Farias Dec 16 '16 at 19:44 add a comment  |  ...